I do like the game play idea and story concept. However, without the screenshots, I would doubt that you can actually survive longer than a minute. It is really frustrating that the melee plants attack range is to small to actually kill the enemy attacking the pump right next. Placing smaller pumps around the main one could have also helped to let the player do more.
That said, in case anybody finds a build order that works let me know. I would like to try mid and late game stuff :D